piskel/js/frameSheetModel.js

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var FrameSheetModel = (function() {
var inst;
var frames = [];
var width;
var height;
var createEmptyFrame_ = function() {
var emptyFrame = new Array(width);
for (var columnIndex=0; columnIndex < width; columnIndex++) {
emptyFrame[columnIndex] = new Array(height);
}
return emptyFrame;
};
return {
validate: function() {
return true; // I'm always right dude
},
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getAllPixels : function () {
var pixels = [];
for (var i = 0 ; i < frames.length ; i++) {
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pixels = pixels.concat(this._getFramePixels(frames[i]));
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}
return pixels;
},
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_getFramePixels : function (frame) {
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var pixels = [];
for (var i = 0 ; i < frame.length ; i++) {
var line = frame[i];
for (var j = 0 ; j < line.length ; j++) {
pixels.push(line[j]);
}
}
return pixels;
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},
// Could be used to pass around model using long GET param (good enough for simple models) and
// do some temporary locastorage
serialize: function() {
return JSON.stringify(frames);
},
/**
* Load a framesheet from a string that might have been persisted in db / localstorage
* Overrides existing frames.
* @param {String} serialized
*/
deserialize : function (serialized) {
try {
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frames = JSON.parse(serialized);
} catch (e) {
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throw "Could not load serialized framesheet." + e.message()
}
},
addEmptyFrame: function() {
frames.push(createEmptyFrame_());
},
getFrameCount: function() {
return frames.length;
},
getFrameByIndex: function(index) {
if (isNaN(index)) {
throw "Bad argument value for getFrameByIndex method: <" + index + ">"
} else if (index < 0 || index > frames.length) {
throw "Out of bound index for frameSheet object."
}
return frames[index];
},
removeFrameByIndex: function(index) {
if(index < 0 || index > inst.getFrameCount()) {
throw "Bad index value for removeFrameByIndex.";
}
frames.splice(index, 1);
},
duplicateFrameByIndex: function(frameToDuplicateIndex) {
var frame = inst.getFrameByIndex(frameToDuplicateIndex);
var clonedFrame = [];
for(var i=0, l=frame.length; i<l; i++) {
clonedFrame.push(frame[i].slice(0));
}
frames.splice(frameToDuplicateIndex + 1, 0, clonedFrame);
},
getInstance: function(width_, height_) {
if (isNaN(width_) || isNaN(height_)) {
throw "Bad FrameSheetModel initialization in getInstance method.";
}
inst = this;
width = width_;
height = height_;
return inst;
}
}
})();